Catheter and its manufacture



Feb. 4, 1941. M uzm 2,230,226

CATHETER AND ITS MANUFACTURE Filed latch 14, 1938 Patented Feb. 4, 1941 UNITED STATES PATENT OFFICE- CATHETER AND ITS MANUFACTURE John M. Auzin, Warwick, R. I., assignor to Davol Rubber Company, a corporation of Rhode Island Application March 14, 1938, Serial No. 195,755

2 Claims. (01. 128-349) My present invention relates to the manufac- 5 separated by longitudinal grooves 23, and a ture of catheters, and has particular reference tip portion 24. When the parts are dipped, the to the manufacture of pezzer head catheters. latex forms as a coating over the former, suc- It is the princip l object f my invention o cessive clippings preferably with intermediate dips 5 provide a catheter construction in which the in coagulent solution building up the catheter to 5 head parts fold together when extended by means the desired thickness. After this thickness is of the usual metal form, so as to facilitate inreached, the catheter is air dried, and the opensertion and removal of the catheter. ings l6 are then cut on the catheter while it is It is a further object of my invention to prostill on the former I1, these openings being cut vide a catheter construction in which the head over the recess ends. The former rod I8 is then 10 parts move together when pressed longitudinalwithdrawn, and the former head 20 may then 1y so as to reduce the over all width of the be withdrawn through one of the openings l6, catheter. the latter being sufiiciently extendible to freely Another object of my invention is to provide a permit the head removal. If desired one opencatheter having grooves intergrally formed in the ing for withdrawal may be cut, the other open- 15 button head so as to guide the head parts in ings being cut after Withdrawal. collapsing when subjected to the longitudinal In practice, a small number of dips, dependpressure of an inserting form. ing on the size of the catheter, are made on the With the above and other objects and advanassembled former; then the coated head is sevtageous features in view, my invention consists ered from the rest of the former, and the head 20 of a novel arrangement of parts more fully discoating removed; then the head is replaced on closed in the detailed description following in the former and the dips are continued, whereby conjunction with the accompanying drawing, a thick catheter tube and a thin pezzer head is and more specifically defined in the claims apobtained. It is sometimes desirable to addipended thereto. tionally dip the top only of the head, to increase 25 In the drawing, the top thickness while keeping the head body Fig. l is a perspective view, partly broken thin, whereby the head body is very elastic andaway, showing the novel catheter; the head top is strengthened to withstand the Fig. 2 is a longitudinal central section thereelongating pressure. of, partly broken away, on the line 2-2 of Fig. 1. The novel catheter is thus an integral pezzer 30 Fig. 3 is a plan view of the novel former for head catheter, formed in one piece, without forming the catheter; seams, and having the pezzer head provided Fig. 4 is an end view of the pezzer head; with indentations or recesses l5, whereby the in- Fig.5 is an end View of the former; sertion of a rod 25, see Fig. 6, and forward pres- Fig. 6 i a perspective view partly broken away, sure on this rod so as to extend the pezzer head, 35

showing the catheter in extended position; and results in a folding of t pe e d s is clea Fig. 7 is a view similar to Fig. 6, sectioned 0n 1y shown in Fig. 6, with the recess portions the line 1-1 of Fig. 6. folding inwardly to permit the entire pezzer Referring to the drawing, the novel button head to assume a relatively narrow outside dihead catheter I!) has a pezzer head II and a ametel' With 0 Parts edges extending 01117, 40 rear, slightly enlarged funnel end l2, the catheter whereby ready insertion a d emoval of the being tubular as shown in Fig. 2, and the head catheter without pain to the patient, results. having a tip 13, which is preferably thickened, The u of forms m n separable pieces s and which may be re-enforced with a textile indisclosed p a, P s the manufacture Of sert or the like, if desired, the catheter also ubber ar i l h v in rm i enlarged P01"- 45 having spaced lobes or sections I4 separated by {710118 of much greater d ter tha the end grooves or indentations I5, which preferably ter- Portions, whereby the inventive Concept y be minate in openings 16 ,1; th i upper d applied to the manufacture of other articles made The catheters are preferably formed of t of rubber or other resilient material, to eliminate by dipping n a, former I! hi h i t of a seams and other disadvantageous features 010- 50 rod portion I8 with a slightly enlarged funnel teined wh using p le m l s. end l9, and a separate h ad portion 2a hi h While I have described a specific construchas a central recess for detachable mounting tional embodiment of y invention, a p fic on a pin 2| extending from th he d nd of method of manufacturing the novel catheter, the rod I8. The head 20 has lobes 22, see Fig, and aspecific former for manufacturing the novel 55 catheter, it is obvious that the invention disclosed supra may be applied to the manufacture of other rubber articles, and that changes in the shape, size, and design of the parts may be made to suit the requirements for difierent rubber articles, and particularly catheters, without departing from the spirit and the scope of the invention as defined in the appended claims.

I claim:

1. An integral one piece seamless catheter having a pezzer head, said head having longitudinal lobes with depressions therebetween, said depressions folding inwardly to permit the pezzer nation of one depression.

ameter when subjected to elongating pressure, 7

and an opening therethrough adjacent one depression.

2. An integral one piece seamless catheter having a pezzer head, said head having longitudinal lobes with depressions therebetween, said depressions folding inwardly to permit the pezzer head to assume a relatively narrow outside diameter when subjected to elongating pressure, and an opening therethrough forming a termi- JOHN M. AUZIN. 

